mxfp.test.cc

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#include <gtest/gtest.h>
 
#include "arch/amdgpu/common/dtype/mxfp_types.hh"
 
template<typename T>
bool test_raw_mxfp(T raw_mxfp, int bits)
{
    float tmp = float(raw_mxfp);
    T from_float(tmp);
 
    // Simply check that casting to float and back yields the same bit values.
    // Exclude inf/NaN as those have multiple values in some MXFP types.
    if (raw_mxfp.data != from_float.data &&
        !std::isnan(tmp) && !std::isinf(tmp)) {
        return false;
    }
 
    return true;
}
 
template<typename T>
int test_type(int bits)
{
    T raw_mxfp;
    int errors = 0;
 
    int max_val = 1 << bits;
    for (int val = 0; val < max_val; ++val) {
        // Raw data is aligned to MSb in MXFP types. Shift into place.
        raw_mxfp.data = val << (32 - bits);
        if (!test_raw_mxfp(raw_mxfp, bits)) {
            errors++;
        }
    }
 
    return errors;
}
 
TEST(MxfpTest, MxBf16Test)
{
    using T = gem5::AMDGPU::mxbfloat16;
 
    int errors = test_type<T>(T::size());
 
    EXPECT_EQ(errors, 0);
}
 
TEST(MxfpTest, MxFp16Test)
{
    using T = gem5::AMDGPU::mxfloat16;
 
    int errors = test_type<T>(T::size());
 
    EXPECT_EQ(errors, 0);
}
 
TEST(MxfpTest, MxBf8Test)
{
    using T = gem5::AMDGPU::mxbfloat8;
 
    int errors = test_type<T>(T::size());
 
    EXPECT_EQ(errors, 0);
}
 
TEST(MxfpTest, MxFp8Test)
{
    using T = gem5::AMDGPU::mxfloat8;
 
    int errors = test_type<T>(T::size());
 
    EXPECT_EQ(errors, 0);
}